These are genuine GlockĀ® factory replacement magazines for Gen5 GlockĀ® 17 / 19X / 34 pistols. A hardened steel insert encased in slick, wear-resistant polymer gives each Gen5 magazine impressive strength and durability. The difference is the polymer for these mags is molded in Glock's desert-ready Coyote color. You can choose between a standard (for full-size 9mm Glocks) 17-round capacity or a 19-round capacity. Competition shooters, law enforcement folks, and tactical operators will love the "Plus 2" option!